"Ego" awakens in the Stauf mansion. The mansion is deserted, but as Ego explores it, he has ghostly visions of events in the past. These visions all take place on a night sometime after the deaths of the children, where six guests were invited to the Stauf mansion. The six arrive but find no sign of Stauf or anyone else. They discover a number of puzzles that give them instructions. They learn that Stauf wanted them to bring him a seventh, uninvited guest: a boy named Tad who entered the house on a dare. The guests debate what to do. Elinor and Hamilton feel they must find Tad and help him escape Stauf's plan. The others search for Tad in earnest to claim their reward from Stauf. The evening becomes bloody as the guests turn on one another or become trapped by Stauf's machinations. Julia, the last survivor, drags Tad to the attic where Stauf waited for them. Having made a pact with the evil force that gave him his visions and killed the children, Stauf has transformed into a horrific creature. He needs Tad's soul to complete the pact. Stauf kills Julia and entangles Tad with a prehensile tongue.

Ego realizes that he is the spirit of Tad, witnessing the events of that night over and over but previously unable to help; the house has been a purgatory for him. Ego finds he can now intervene in the events, and helps Tad to escape. Stauf is unable to recapture the child, and the evil entity consumes Stauf for failing to complete the pact. Tad thanks Ego for his help, and then Ego steps into a sphere of light and disappears.